maybe that's why baltimore-born pelosi is backing the 49ers and not the ravens. pelosi said growing up, she was a ravens' fan, but her constituency is san francisco. pelosi puts it this way, i'm rooting for the 49ers. i'm not rooting against baltimore. stay with ktvu for continuing coverage leading up to super bowl xlvii. we are following the team as they prepare for the game in new orleans. we're also sending crews to the big easy. plus, you will find updates on ktvu.com. >>> some dangerously low temperatures are hitting the northern central and northeast states. an arctic air mass is hovering over the region for a fourth day and the forecast says the big chill will continue right on into the weekend. one woman in minnesota suffered frostbite on her toes after running out of gas on the highway. >> an hour before we got here, i just started crying. i couldn't bend my toes. >> this wind is incredible. we just layered up. we're trying our best to stay warm. >> the national weather service has issued wind chill warnings in several areas. the wind chill will drive te